ST7LITEU09 STMicroelectronics, ST7LITEU09 Datasheet - Page 65

• Manufacturer Part Number: ST7LITEU09
• Description: ST7ULTRALITE - 8-BIT MCU WITH 2K SINGLE VOLTAGE FLASH MEMORY, ADC, TIMERS
• Manufacturer: STMicroelectronics

Specifications of ST7LITEU09

• 2k Bytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C
• 128 Bytes Data Eeprom. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C
• Clock Sources: internal trimmable 8MHz RC oscillator, internal low power, low frequency RC oscillator or external clock
• Five Power Saving Modes: Halt, Auto Wake Up from Halt, Active-Halt, Wait and Slow
• One 8-bit Lite Timer (lt) With Prescaler Including: watchdog, 1 realtime base and 1 input capture

ST7LITEU05 ST7LITEU09
Caution:
10.2.4
Caution:
Table 21.
1. When the I/O port is in input configuration and the associated alternate function is enabled as an output,
2. When the I/O port is in output configuration and the associated alternate function is enabled as an input,
The alternate function must not be activated as long as the pin is configured as input with
interrupt, in order to avoid generating spurious interrupts.
Analog alternate function
When the pin is used as an ADC input, the I/O must be configured as floating input. The
analog multiplexer (controlled by the ADC registers) switches the analog voltage present on
the selected pin to the common analog rail which is connected to the ADC input.
It is recommended not to change the voltage level or loading on any port pin while
conversion is in progress. Furthermore it is recommended not to have clocking pins located
close to a selected analog pin.
The analog input voltage level must be within the limits stated in the absolute maximum
ratings.
reading the DR register will read the alternate function output status.
the alternate function reads the pin status given by the DR register content.
I/O port configurations
PAD
PAD
PAD
V
V
V
DD
R
DD
DD
R
R
PU
PU
PU
PULL-UP
CONDITION
Hardware configuration
INTERRUPT
CONDITION
OTHER
FROM
PINS
ALTERNATE
ALTERNATE
REGISTER
ENABLE
ENABLE
DR
DR REGISTER ACCESS
SELECTION
REGISTER
REGISTER
POLARITY
DR
DR
DR REGISTER ACCESS
DR REGISTER ACCESS
W
R
ALTERNATE
ALTERNATE
OUTPUT
OUTPUT
ALTERNATE INPUT
EXTERNAL INTERRUPT
SOURCE (ei
ANALOG INPUT
R/W
R/W
DATA BUS
DATA BUS
DATA BUS
x
)
I/O ports
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